apl: life.apl runs as-written (+5 e2e)

Five infrastructure fixes to make the Hui formulation
{1 ⍵ ∨.∧ 3 4 = +/+/¯1 0 1 ∘.⊖ ¯1 0 1 ⌽¨ ⊂⍵} work:

1. apl-each-dyadic: unbox enclosed-array scalar before pairing;
   preserve array results instead of disclosing
2. apl-outer: same dict-vs-number wrap detection
3. apl-reduce: dict-aware wrap in reducer; don't double-wrap
   the final result in apl-scalar when it's already a dict
4. broadcast-dyadic: leading-axis extension for shape-(k) vs
   shape-(k …) — `3 4 = M[5,5]` → shape (2 5 5)
5. :vec eval keeps non-scalar dicts intact (no flatten-to-first)

life.apl: drop leading ⊃ (Hui's ⊃ assumes inner-product produces
enclosed cell; our extension-style impl produces clean (5 5)).
Comment block in life.apl explains.

5 e2e tests: blinker oscillates period-2, 2×2 block stable,
empty grid stays empty, source file load via apl-run-file.

Full suite 578/578.

lib/apl/transpile.sx

@@ -133,7 +133,14 @@
               ((vals (map (fn (n) (apl-eval-ast n env)) items)))
               (make-array
                 (list (len vals))
-                (map (fn (v) (first (get v :ravel))) vals)))))
+                (map
+                  (fn
+                    (v)
+                    (if
+                      (= (len (get v :shape)) 0)
+                      (first (get v :ravel))
+                      v))
+                  vals)))))
         ((= tag :name)
           (let
             ((nm (nth node 1)))